test(task-374): fix errcheck issues in tests and support code

3 files changed, 25 insertions, 7 deletions

diff --git a/internal/gui/app.go b/internal/gui/app.go
index c65cb42..5d37879 100644
--- a/internal/gui/app.go
+++ b/internal/gui/app.go
@@ -146,7 +146,9 @@ func New(config *Config) *Application {
 	}
 
 	// Ensure output directory exists
-	os.MkdirAll(config.OutputDir, 0755)
+	if err := os.MkdirAll(config.OutputDir, 0755); err != nil {
+		fmt.Fprintf(os.Stderr, "Warning: failed to create output directory %q: %v\n", config.OutputDir, err)
+	}
 
 	ctx, cancel := context.WithCancel(context.Background())
 
@@ -629,7 +631,9 @@ func (a *Application) generateMaterials(word string) {
 		if translation != "" {
 			translationFile := filepath.Join(cardDir, "translation.txt")
 			content := fmt.Sprintf("%s = %s\n", word, translation)
-			os.WriteFile(translationFile, []byte(content), 0644)
+			if err := os.WriteFile(translationFile, []byte(content), 0644); err != nil {
+				fmt.Printf("Warning: Failed to save translation for '%s': %v\n", word, err)
+			}
 		}
 	}
 	// Create channels for parallel operations
@@ -722,7 +726,9 @@ func (a *Application) generateMaterials(word string) {
 		// Save phonetic info to disk using the pre-determined directory
 		if phoneticInfo != "" && phoneticInfo != "Failed to fetch phonetic information" {
 			phoneticFile := filepath.Join(cardDir, "phonetic.txt")
-			os.WriteFile(phoneticFile, []byte(phoneticInfo), 0644)
+			if err := os.WriteFile(phoneticFile, []byte(phoneticInfo), 0644); err != nil {
+				fmt.Printf("Warning: Failed to save phonetic info for '%s': %v\n", word, err)
+			}
 		}
 		// Update UI immediately with phonetic info if this is still the current word
 		if phoneticInfo != "" && phoneticInfo != "Failed to fetch phonetic information" {
@@ -2161,7 +2167,9 @@ func (a *Application) processWordJob(job *WordJob) {
 		// Save phonetic info to disk immediately for this specific word
 		if phoneticInfo != "" && phoneticInfo != "Failed to fetch phonetic information" {
 			phoneticFile := filepath.Join(cardDir, "phonetic.txt")
-			os.WriteFile(phoneticFile, []byte(phoneticInfo), 0644)
+			if err := os.WriteFile(phoneticFile, []byte(phoneticInfo), 0644); err != nil {
+				fmt.Printf("Warning: Failed to save phonetic info for '%s': %v\n", job.Word, err)
+			}
 		}
 
 		// Update UI immediately with phonetic info if this is still the current job
diff --git a/internal/gui/generator.go b/internal/gui/generator.go
index 9c20e92..14f0f60 100644
--- a/internal/gui/generator.go
+++ b/internal/gui/generator.go
@@ -327,7 +327,9 @@ func (a *Application) generateImagesWithPrompt(ctx context.Context, word string,
 			openaiClient.SetPromptCallback(func(prompt string) {
 				// Save the prompt to disk immediately for this word
 				promptFile := filepath.Join(cardDir, "image_prompt.txt")
-				os.WriteFile(promptFile, []byte(prompt), 0644)
+				if err := os.WriteFile(promptFile, []byte(prompt), 0644); err != nil {
+					fmt.Printf("Warning: Failed to save prompt for '%s': %v\n", word, err)
+				}
 
 				// Only update UI if this word is still the current word
 				a.mu.Lock()
diff --git a/internal/gui/widgets.go b/internal/gui/widgets.go
index 6e40391..aee6f13 100644
--- a/internal/gui/widgets.go
+++ b/internal/gui/widgets.go
@@ -81,7 +81,11 @@ func (d *ImageDisplay) SetImage(imagePath string) {
 		d.imageLabel.SetText(fmt.Sprintf("Error loading image: %v", err))
 		return
 	}
-	defer file.Close()
+	defer func() {
+		if closeErr := file.Close(); closeErr != nil {
+			fmt.Printf("Warning: failed to close image file %q: %v\n", imagePath, closeErr)
+		}
+	}()
 
 	// Get file info to ensure it's fully written
 	stat, err := file.Stat()
@@ -141,7 +145,11 @@ func ResourceFromPath(path string) (fyne.Resource, error) {
 	if err != nil {
 		return nil, err
 	}
-	defer file.Close()
+	defer func() {
+		if closeErr := file.Close(); closeErr != nil {
+			fmt.Printf("Warning: failed to close resource file %q: %v\n", path, closeErr)
+		}
+	}()
 
 	data, err := os.ReadFile(path)
 	if err != nil {